JPH06295192A - Comparing device - Google Patents

Abstract

PURPOSE:To objectively obtain a difference in singing without being affected by the individual capability of a singer even when the singer changes to an easy-to-sing interval by correcting interval information on reference singing according to accompaniment interval information showing the interval of an accompaniment and comparing the corrected interval information with interval information on compared singing. CONSTITUTION:A reference singing interval detection part 11 detects the interval of the reference singing and a compared singing interval detection part 13 detects the interval of the compared singing. Then an interval information correction part 12 corrects the interval information detected by the reference singing interval detection part 11 by the accompaniment interval information and a comparison part 14 compares the corrected information with the interval information detected by the compared singing interval detection part 13 and outputs the comparison result. Consequently, even when the compared singing having the same interval as an interval-converted accompaniment is obtained as a result of the conversion of the interval of the accompaniment, the interval can normally be compared with the interval of the interval- unchanged reference singing, so even when the singer whose singing is to be compared changes the interval of the accompaniment, the interval comparison result is obtained without being affected by the interval change.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for reproducing audio, such as a tape recorder, a video tape recorder, a video disc player, etc., when reproducing software for karaoke. The present invention relates to a comparison device that is effective when performing a process of comparing a song of an existing singer and a song of an original song.

[0002]

2. Description of the Related Art In recent years, as the software used when performing karaoke, software in which the singing of the original song is recorded as a singing signal for use as a model for karaoke practice together with accompaniment is widely used. Further, as a correction means when the pitch of the singer does not match the pitch of the accompaniment when performing karaoke, the player of the karaoke software is equipped with a key controller capable of changing the pitch of the accompaniment. Is common.

An audio signal processing circuit in a reproducing device equipped with a key controller will be described below with reference to FIG.

FIG. 7 is a block diagram of a conventional audio signal processing circuit. In FIG. 7, 71 is an amplitude adjuster that adjusts the amplitude of the song of the original song recorded with the accompaniment, 72 is a first adder that adds the output of the amplitude adjuster 71 to the accompaniment, and 73 is a first adder. A key controller that converts the pitch of the signal output by 72, and a second adder 74 that outputs the output voice by adding the singing of the singer to the signal output by the key controller 73.

The operation of the audio signal processing circuit configured as described above will be described. First, the singing of the original song used as a model when practicing karaoke is adjusted by the amplitude adjuster 71 so that the singer can easily hear. The original song of which the amplitude is adjusted is added to the accompaniment by the first adder 72 and input to the key controller 73. Then, the pitch of the original song whose accompaniment and amplitude are adjusted by the key controller 73 is converted. It should be noted here that the accompaniment and the singing of the original song are reproduced from the same software, so their pitches match, so when converting one pitch, the other must be converted in the same way. It is necessary. Therefore, the singing of the original song whose accompaniment and amplitude is adjusted is input to the input of the key controller 73, and the pitch is converted at a time. And
By adding the song of the singer to the output of the key controller 73 by the second adder 74, the pitch-converted accompaniment and the song of the original song are output as output voice together with the song of the singer.

In this way, the singer can practice karaoke using the singing of the original song in a state in which the accompaniment and the singing of the original song are subjected to arbitrary pitch conversion.

[0007]

However, in the above-mentioned conventional configuration, the comparison between the pitch of the original song and the pitch of the song of the singer is performed by the singer listening to the output singing, and the difference between the respective singing is subjectively evaluated. It is obtained as a result of interpretation.
If the singer has a good listening ability, you can understand the difference in pitch between the original song and your own song, but if you have poor listening ability, the difference between the original song and your own song There is a problem that it is difficult to understand, and it is difficult to make an objective evaluation, and there is a drawback that the difference in pitch can be grasped only from the subjective viewpoint of the singer.

The present invention solves the above-mentioned problems of the related art. In consideration of the pitch state of the accompaniment, the information of the original song and the song of the singer is detected, and the comparison result is obtained. , Even if the singer changes the accompaniment to a pitch that is easy to sing, an object is to provide an environment in which the difference in singing can be objectively obtained regardless of the individual ability of the singer.

[0009]

In order to achieve this object, a comparison device of the present invention has a reference song pitch detecting section for detecting the pitch of a reference song and an accompaniment pitch based on the pitch information detected by the reference song pitch detecting section. A pitch information correction unit that corrects with information,
It has a configuration including a comparative song pitch detecting section that detects the pitch of the comparative song, and a comparing section that compares the pitch information output by the pitch information correcting section and the comparative song pitch detecting section and outputs the comparison result.

Further, the reference song pitch detecting section for detecting the pitch of the reference song, the comparative song pitch detecting section for detecting the pitch of the comparative song, and the pitch information detected by the comparative song pitch detecting section are corrected by the accompaniment pitch information. The pitch information correction unit includes a reference song pitch detection unit and a comparison unit that compares pitch information output by the pitch information correction unit and outputs a comparison result.

The reference song pitch detecting section for detecting the pitch of the reference song, the comparative song pitch detecting section for detecting the pitch of the comparative song, and the pitch information output by the reference song pitch detecting section and the comparative song pitch detecting section. It is configured to include a comparison unit that compares and outputs comparison information, and a comparison information correction unit that corrects the comparison information output by the comparison unit with accompaniment pitch information.

Further, a pitch conversion section for converting the pitch of the reference song according to accompaniment pitch information, a reference song pitch detection section for detecting the pitch of the pitch-converted reference song output from the pitch conversion section, and a pitch of the comparative song. A comparative singing pitch detection unit for detecting,
The reference singing pitch detection unit and the comparison singing pitch detection unit compare the pitch information output by the comparison singing pitch detection unit and output a comparison result.

[0013]

With this configuration, the pitch information correction unit corrects the pitch information detected by the reference song pitch detection unit with the accompaniment pitch information, and the pitch information detected by the comparative song pitch detection unit is compared by the comparison unit. By comparing the pitches of the accompaniment, even if the comparative singing has the same pitch as the pitch-converted accompaniment, it is possible to normally perform the pitch comparison with the reference singing whose pitch is not changed. Therefore, the singer who issues the comparative singing can obtain the pitch comparison result without being affected by the conversion of the accompaniment pitch.

[0014]

【Example】

(Embodiment 1) A first embodiment of the comparison apparatus of the present invention will be described with reference to FIG. FIG. 1 is a block diagram showing a first embodiment of the comparison apparatus of the present invention.

In FIG. 1, 11 is a reference song pitch detecting section for detecting the pitch of the reference song, 12 is a pitch information correcting section for correcting the pitch information output from the reference song pitch detecting section 11 by accompaniment pitch information, and 13 is a comparison. A comparative song pitch detection unit that detects the pitch of the song, 14 is a comparison unit that compares the pitch information output by the pitch information correction unit 12 and the comparative song pitch detection unit 13 and outputs a comparison result, and 15 converts the pitch of the accompaniment. A key controller 16 is an adder that adds a comparative song to the key controller 15 and outputs an output voice.

The comparison device configured as described above will be described with reference to FIG. First, the reference song has its pitch detected by the reference song pitch detection unit 11, and the comparison song has its pitch detected by the comparison song pitch detection unit 13.

Now, the detection operations of the reference song pitch detecting section 11 and the comparative song pitch detecting section 13 will be described with reference to FIG.

FIG. 2 is a circuit diagram of the singing pitch detecting section of the reference singing pitch detecting section 11 and the comparative singing pitch detecting section 13. Two
Reference numeral 1 is a filter, 22 is a zero-cross extraction circuit for detecting the zero-cross of the input signal, and 23 is a pitch calculation circuit for converting the result of the zero-cross extraction circuit 22 into a pitch.

First, the input song has its DC component cut off by the filter 21, and a signal corresponding to the frequency range of the fundamental tone is extracted. The output signal of the filtered filter 21 is input to the zero-cross extraction circuit 22,
The time of the zero crossing interval when this signal crosses 0V is detected. Here, since the DC component of the signal input to the zero-cross extraction circuit 22 is cut by the filter 21, the time of the zero-cross interval becomes the signal cycle. The period information of this signal is input to the pitch calculation circuit 23 and frequency-converted into pitch information. Note that when singing a song, octave-shifted songs may be regarded as the same pitch because the key relationships are the same. Therefore, as the detection processing in the pitch calculation circuit 23, if the detection result is divided into one octave by constant data and the pitch is assigned to each data, the pitch information of different octaves is all the same information, which is convenient. For example, if one octave is divided into 256 and the data is represented by binary 8-bit data, the same data is obtained every time the data exceeds an octave.

Next, the pitch information correcting section 12 for correcting the pitch information detected by the reference song pitch detecting section 11 will be described. The reference information for correction in the pitch information correction unit 12 is accompaniment pitch information.

Now, the relationship between the accompaniment, the reference song, and the pitch of the comparative song issued by the singer will be described.

First, the accompaniment and the standard singing are generally obtained by reproducing the same recording medium. For example, a compact disc or a laser disc according to a recording format called "Onta" is obtained. To be In the compact disc, the accompaniment is recorded on the L channel and the reference song is recorded on the R channel, so that the accompaniment and the reference song can be obtained independently. However, in the laser disc, a monaural accompaniment is recorded in the L channel of analog audio, and a monaural accompaniment and a standard singing are recorded in the R channel. Therefore, the laser disc needs a process of extracting the reference song, but the reference song can be obtained by subtracting the L channel from the R channel while paying attention to the amplitude difference of the monaural accompaniment of each channel. Generally, the pitches of the accompaniment and the reference song as described above are recorded in the same pitch. Further, since the comparative singing is obtained by the singer monitoring the accompaniment, if the accompaniment and the reference singing recorded on the recording medium are reproduced without changing the pitch, the comparative singing will have the same pitch. become.

However, in the karaoke equipment for reproducing these tone polyphonic software, there is a key controller 15 for changing the pitch of the accompaniment by controlling the accompaniment pitch of the singer so that the singer can sing at a pitch easy to sing. When the pitch of the accompaniment is converted by this, the singer monitors the pitch-converted accompaniment from the output voice output from the adder 16 and sings, so that the pitch of the comparative singing coincides with that of the accompaniment. However, since the signal input to the reference song pitch detection unit 11 is the pitch as it is reproduced from the recording medium, when the pitch of the accompaniment is converted, the pitch shifts by the conversion amount. If you increase the pitch of the accompaniment, the pitch of the standard song will be lower than the accompaniment,
If the pitch of the accompaniment is lowered, the pitch of the reference song becomes higher than that of the accompaniment.

Therefore, the pitch information correcting unit 12 adds the above-mentioned change in the pitch of the accompaniment to the pitch information detected by the reference singing pitch detecting unit 11, for example, the pitch of the accompaniment is raised. In this case, the pitch of the standard singing may be increased by the pitch increase change of the accompaniment, and when the pitch of the accompaniment is lowered, the pitch of the reference singing may be decreased by the pitch decrease of the accompaniment. Here, if the information content of the accompaniment pitch information and the pitch information output by the reference song pitch detecting section 11 are unified, the processing in the pitch information correcting section 12 can be simplified. For example, in the pitch information of the accompaniment and the pitch information output by the reference song pitch detection section 11, the content of the pitch information can be unified by expressing the semitone difference as 1. At this time, if there is no change in the pitch of the accompaniment and it is set to 0, the pitch information of the accompaniment when the accompaniment is raised by one semitone is +1.
Therefore, when the pitch information correction unit 12 executes the correction for increasing the input pitch information by a semitone, the correction amount may be set to +1. In addition, in FIG. 1, the key controller 1
Although the accompaniment pitch information is obtained from No. 5, if the accompaniment pitch control for controlling the key controller 15 matches the accompaniment pitch information, it can be used as the accompaniment pitch information. In this embodiment, targeting the standard song,
The pitch information will be corrected.

Next, the operation of the comparison section 14 will be described with reference to FIG. FIG. 3 is a circuit diagram of the comparison unit 14. 31 is a first pitch information storage circuit that stores first pitch information, 32 is a second pitch information storage circuit that stores second pitch information, and 33 is a first pitch information storage circuit 31. A pitch comparison circuit that compares the first pitch information and the second pitch information stored in the second pitch information storage circuit 32 and outputs a comparison result, and 34 is the first pitch information storage circuit 31 and the second pitch information. The control circuit controls the information storage circuit 32 and the pitch comparison circuit 33.

The operation of the comparing section 14 constructed as above will be described. First, the pitch information output by the pitch information correction unit 12 in FIG. 1 is input as the first pitch information, and the pitch information output by the comparative singing pitch detection unit 13 is input as the second pitch information. Each pitch information entered is
The first pitch information is stored in the first pitch information storage device 31 as the second pitch information.
The pitch information of is stored in the second pitch information storage circuit 32, respectively. Then, the pitch comparison circuit 33 compares the respective pitch information stored in the first pitch information storage circuit 31 and the second pitch information storage circuit 32.

The control operation is performed by the control circuit 34 for the first comparison.
Pitch information storage circuit 31 and second pitch information storage circuit 32
The control circuit 34 determines when the pitch comparison circuit 33 compares the pitch information stored in the first pitch information storage circuit 31 with the pitch information stored in the second pitch information storage circuit. When the stored information exists in the respective storage circuits within the specific time determined by, the pitch comparison circuit 33 compares the stored information with the first pitch information storage circuit 31 and the second pitch information storage circuit 31. The comparison result can be obtained when the pitch information stored in 32 simultaneously exists. The specific time at this time is set to the minimum time at which the pitch can be detected by the reference song pitch detection unit 11 and the comparative song pitch detection unit 13. By such processing, the comparison unit 14 can obtain the comparison result when the detection results of the reference song pitch detection unit 11 and the comparison song pitch detection unit 13 are obtained at the same time. Thus, if the comparison unit 14 outputs the comparison result only when the pitch detection results are obtained at the same time, the comparison result can be obtained only when the reference song and the comparison song are present at the same time. ,
When either the reference song or the comparison song is lacking, the comparison unit 14 does not output the comparison result by mistake, so that the reliability of the comparison result can be greatly improved.

The difference in the pitch of the singing that is felt when the two songs are compared is not an instantaneous difference, but is felt when the singing is continued for a certain period of time, for example, 1 second.
Therefore, as the process in the comparison unit 14, the control circuit 34 performs a process in which the pitch comparison circuit 33 compares the pitch information in the first pitch information storage circuit 31 and the pitch information in the second pitch information storage circuit 32 at regular intervals, for example, 1 If you run it for a second,
The comparison unit 14 can determine the comparison result at regular time intervals. In this way, if the comparison unit 14 decides the comparison result at regular intervals, the comparison of the pitches that is perceived by the user and the comparison result output by the comparison unit 14 will match. The output comparison result can be made more effective as a singing practice tool.

Then, when the comparison result is fixed at a constant time in the comparison unit 14 as described above, the pitch comparison circuit 33 causes the pitch information of the first pitch information storage circuit 31 and the second pitch information storage circuit 32 to be recorded. When there is a plurality of pitch information stored in the first pitch information storage circuit 31 and the second pitch information storage circuit 32, the pitch comparison circuit 33 can obtain a plurality of comparison results. Then, if the plurality of comparison results are averaged to obtain comparison results at constant time intervals, the pitch information stored in the first pitch information storage circuit and the second pitch information storage circuit 32 may vary or may be erroneously detected. Even if the included pitch information is included, a highly accurate comparison result can be obtained.

The comparison result output from the comparison unit 14 is used for the data of the display device that displays the pitch deviation on the television screen according to the comparison result, or for the data of the device that marks the matching of the pitches. As a result, the singer can know the objective judgment about the pitch deviation, and can use this for practicing the song.

With this configuration, the pitch information detected by the reference song pitch detecting section 11 is corrected by the pitch information correcting section 12 based on the accompaniment pitch information, and the pitch information detected by the comparative song pitch detecting section 13 and the corrected information. The comparison unit 14 compares the information and outputs the comparison result.

As described above, the comparison device shown in this embodiment corrects the pitch information of the reference singing by the accompaniment pitch information indicating the pitch of the accompaniment, and compares the corrected pitch information with the pitch information of the comparative singing. Thus, even if the singer changes the pitch of the accompaniment, the singer can obtain a correct comparison result objectively compared.

(Embodiment 2) A second embodiment of the comparison apparatus of the present invention will be described with reference to FIG. FIG. 4 is a block diagram showing a second embodiment of the comparison apparatus of the present invention.

In FIG. 4, 41 is a reference song pitch detecting section for detecting the pitch of the reference song, 42 is a comparative song pitch detecting section for detecting the pitch of the comparative song, and 43 is pitch information output by the comparative song pitch detecting section 42. Is a pitch information correction unit that corrects the pitch information with the accompaniment pitch information, and 44 is a comparison unit that compares the pitch information output by the reference song pitch detection unit 41 and the pitch information correction unit 43 and outputs a comparison result.

The comparison device constructed as above will be described with reference to FIG. First, the reference song has its pitch detected by the reference song pitch detecting section 41, and the comparative song has its pitch detected by the comparative song pitch detecting section 42. In the first embodiment, the pitch information correction unit 12 corrects the pitch information output by the reference song pitch detection unit 11, but in the present embodiment, the pitch information correction unit 43 outputs the comparison song pitch detection unit 42. The pitch information to be corrected is corrected. Since the comparative singing is performed by the singer monitoring the accompaniment and singing, the pitch is changed along with the change of the pitch of the accompaniment, but in the present embodiment, the pitch information correction unit is based on the pitch information detected by the comparative singing pitch detection unit 42. Four
By subtracting 3 from the accompaniment pitch information, the comparison result output by the comparison unit 44 is correct even if the accompaniment pitch is changed. For example, as in the first embodiment, the pitch information is unified, and the pitch information of the accompaniment and the comparative singing pitch detection unit 42 are used.
In the pitch information output by, the semitone difference is represented by 1, and if there is no change in the pitch of the accompaniment, the pitch information of the accompaniment is +1 when the accompaniment is raised by one semitone, and the input pitch information is the semitone. When the pitch information correction unit 43 executes the correction for increasing the pitch, the correction amount should be -1. In this embodiment, the pitch information is corrected for the comparative song.

In this way, the pitch information correcting section 43 corrects the pitch information output from the comparative singing information detecting section 42.
This is a difference from the first embodiment. In the constituent elements, the reference song pitch detection unit 41 is the reference song pitch detection unit 11, the comparison song pitch detection unit 42 is the comparison song pitch detection unit 13, the comparison unit 44 is the comparison unit 14, and the key controller 45 is the key controller 15. , And the adder 46 operates exactly the same as the adder 16, respectively.

With the above configuration, the pitch information detected by the comparative singing pitch detecting section 42 is corrected by the pitch information correcting section 43 based on the accompaniment pitch information, and the corrected information and the reference singing pitch detecting section 41 detect it. The comparison unit 44 compares the pitch information and outputs the comparison result, so that a correct comparison result can be obtained in consideration of the pitch change of the accompaniment.

Compared with the first embodiment, there are cases where the present embodiment is easier to design due to restrictions such as circuit layout when actually designing the comparison device, and the configuration shown in this embodiment is also present. However, the same effect can be obtained.

As described above, the comparison device shown in this embodiment corrects the pitch information of the comparative singing by the accompaniment pitch information indicating the pitch of the accompaniment, and compares the corrected pitch information with the pitch information of the reference singing. Thus, even if the singer changes the pitch of the accompaniment, the singer can obtain a correct comparison result objectively compared.

(Embodiment 3) A third embodiment of the comparison apparatus of the present invention will be described with reference to FIG. FIG. 5 is a block diagram showing a third embodiment of the comparison apparatus of the present invention.

In FIG. 5, reference numeral 51 is a reference song pitch detecting section for detecting the pitch of the reference song, 52 is a comparative song pitch detecting section for detecting the pitch of a comparative song, and 53 is a reference song pitch detecting section 51 and a comparative song pitch. A comparison unit that compares the pitch information output by the unit 52 and outputs comparison information, and a reference information correction unit 54 corrects the comparison information output by the comparison unit 53 by accompaniment pitch information.

The comparison device configured as described above will be described with reference to FIG. First, the reference song pitch detection unit 51 detects the pitch of the reference song, and the comparison song pitch detection unit 52 detects the pitch of the comparative song. Then, the comparison unit 53 compares the pitch information output by the reference song pitch detection unit 51 and the comparison song pitch detection unit 52. Here, the pitch of the accompaniment is not considered in the comparison information output from the comparison unit 53. In the present embodiment, the comparison information correction unit 54 performs the comparison information output from the comparison unit 53 based on the accompaniment pitch information, so that a correct comparison result can be obtained.

Here, the content corrected by the comparison information correction unit 54 is that the comparison song sung by the singer is the comparison target, and therefore the comparison result is how the pitch of the comparison song deviates from the reference song. Will be output. Therefore,
The comparison information correction unit 5 compares the comparison information output by the comparison unit 53.
For No. 4, it suffices to subtract the pitch conversion of the accompaniment. For example, the pitch information is unified as in the first embodiment, and the semitone difference is represented by 1 in the pitch information of the accompaniment and the pitch information output by the reference song pitch detection unit 11, and there is no pitch change of the accompaniment. When it is set to 0, the pitch information of the accompaniment when the accompaniment is raised by one semitone becomes +1 and the comparative song has a pitch increase of +1 with respect to the reference song. When the pitch of the comparative singing is compared with that of the reference singing, the +1 minute pitch is a high comparison result, so the comparison correction amount is -1. In this embodiment, the comparison information output by the comparison unit 53 is targeted for correction.

In this way, the comparison information correction unit 54 corrects the comparison information output from the comparison unit 53, which is a difference from the first embodiment. In the constituent elements, the reference song pitch detection unit 51 is the reference song pitch detection unit 11, the comparative song pitch detection unit 52 is the comparative song pitch detection unit 13, the comparison unit 53 is the comparison unit 14, and the key controller 55 is the key controller 15. Then, the adder 56 operates exactly the same as the adder 16, respectively.

With the above configuration, the pitch information detected by the reference song pitch detecting section 51 and the comparative song pitch detecting section 52
The comparison unit 53 compares the pitch information detected by the comparison unit 53,
The comparison information corrector 54 corrects the comparison information output by the accompaniment pitch information based on the accompaniment pitch information and outputs the comparison result, so that a correct comparison result in consideration of the change in the accompaniment pitch can be obtained.

Compared with the first and second embodiments,
In some cases, due to restrictions when actually designing the comparison device, this embodiment may be easier to design, and the same effect can be obtained with the configuration shown in this embodiment. For example, if a microcomputer exists and the accompaniment pitch control and the comparison information are used, the comparison information output from the comparison unit 53 can be easily corrected only by software design of the microcomputer.

As described above, the comparison apparatus shown in this embodiment corrects the comparison information obtained by comparing the pitches of the reference song and the comparison song with the accompaniment pitch information indicating the pitch of the accompaniment, so that the singer can play the accompaniment. Even if the pitch is changed, the singer can obtain the correct comparison result objectively compared.

(Embodiment 4) A fourth embodiment of the comparison apparatus of the present invention will be described with reference to FIG. FIG. 6 is a block diagram showing a fourth embodiment of the comparison apparatus of the present invention.

In FIG. 6, reference numeral 61 is a pitch conversion section for converting the pitch of the reference song by accompaniment pitch control corresponding to accompaniment pitch information, and 62 is the pitch of the pitch-converted reference song output from the pitch conversion section 61. Reference song pitch detection unit, 63
Is a comparative song pitch detecting section for detecting the pitch of the comparative song, 64
Is a comparison unit that compares the pitch information output by the reference song pitch detection unit 62 and the comparison song pitch detection unit 63 and outputs the comparison information.

The comparison device configured as described above will be described with reference to FIG. First, the reference song is converted into the same pitch as the pitch of the accompaniment by the pitch conversion section 61 by accompaniment pitch control. Therefore, the pitch-converted pitch of the reference song output by the pitch converter 61 is the same as the pitch of the comparative singing that the singer monitors the accompaniment and the accompaniment.
In the following process, a correct comparison result can be obtained without considering accompaniment pitch information. Then, the reference song with the changed pitch output by the pitch conversion unit 61 is the reference song pitch detection unit 6
2 is input and the pitch is detected. Further, the comparative singing is input to the comparative singing pitch detecting section 63, and the pitch is detected. The detected pitch information is compared with the comparison unit 64,
The comparison unit 64 outputs the comparison result.

The difference from the first embodiment is that the pitch conversion section 61 converts the reference singing into the same pitch as the accompaniment before being input to the reference pitch detection section 62. In the constituent elements, the reference song pitch detection unit 62 is the reference song pitch detection unit 11, the comparative song pitch detection unit 63 is the comparative song pitch detection unit 13, the comparison unit 64 is the comparison unit 14, and the key controller 65 is the key controller 15. And the adder 66 operates exactly the same as the adder 16, respectively.

With the above configuration, the reference song is converted into the same pitch as the accompaniment pitch by the pitch converting section 61, and then input to the reference song detecting section 62, which is detected by the reference song pitch detecting section 62. The comparison section 64 compares the selected pitch information and the pitch information detected by the comparative singing pitch detection section 63 and outputs the comparison result, whereby a correct comparison result in consideration of the change in the accompaniment pitch can be obtained.

Compared with the first embodiment, the second embodiment, and the third embodiment, there are cases where this embodiment is easier to design due to restrictions when actually designing the comparison device. The same effect can be obtained with the configuration shown in this embodiment. For example, when the accompaniment pitch conversion means has an input / output in addition to the accompaniment part, the pitch conversion section 61 can employ the same thing as the key controller 65 in which the accompaniment pitch is changed, so that the hardware can be effectively used. Further, when the pitch detection and comparison processing of the singing in the first embodiment, the second embodiment, and the third embodiment are realized by the software of the microcomputer,
Without changing the software, the key controller 65
The comparison device of the present invention can be easily configured by adding the pitch conversion unit 61 that performs the same operation as the above.

As described above, the comparison device shown in this embodiment changes the pitch of the reference singing to be detected by the accompaniment pitch information indicating the pitch of the accompaniment, and the pitch information of the pitch-changed reference singing and comparison singing. Even if the pitch of the accompaniment is changed by the singer, the singer can obtain the correct comparison result objectively compared.

[0055]

As described above, according to the present invention, the reference singing pitch detecting section, the pitch information correcting section, the comparative singing pitch detecting section,
By providing the comparison unit and correcting the pitch information by the pitch information unit based on the accompaniment pitch information, it is possible to obtain a correct comparison result objectively compared without changing the pitch of the accompaniment.

[Brief description of drawings]

FIG. 1 is a block diagram showing a first embodiment of a comparison device of the present invention.

FIG. 2 is a circuit diagram of a singing pitch detection section in the embodiment.

FIG. 3 is a circuit diagram of a comparison unit in the same embodiment.

FIG. 4 is a block diagram showing a second embodiment of the comparison apparatus of the present invention.

FIG. 5 is a block diagram showing a third embodiment of the comparison apparatus of the present invention.

FIG. 6 is a block diagram showing a fourth embodiment of the comparison apparatus of the present invention.

FIG. 7 is a block diagram of a conventional audio signal processing circuit.

[Explanation of symbols]

 11 Reference Singing Interval Detection Section 12 Interval Information Correction Section 13 Comparative Singing Interval Detection Section 14 Comparison Section 15 Key Controller 16 Adder 41 Reference Singing Interval Detection Section 42 Comparative Singing Interval Detection Section 43 Interval Information Correction Section 44 Comparison Section 45 Key Controller 46 Adder 51 Reference singing pitch detection unit 52 Comparative singing pitch detection unit 53 Comparison unit 54 Comparison information correction unit 55 Key controller 56 Adder 61 Interval conversion unit 62 Reference singing pitch detection unit 63 Comparative singing pitch detection unit 64 Comparison unit 65 Key controller 66 adder

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kenji Muraki 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (16)

[Claims] 1. A reference song pitch detecting means for detecting a pitch of a reference song, a pitch information correcting means for correcting pitch information detected by the reference song pitch detecting means by accompaniment pitch information indicating a pitch of an accompaniment, and a comparative song. And a comparison unit for comparing the pitch information output by the pitch information correcting unit and the pitch information output by the comparative song pitch detecting unit and outputting a comparison result. 2. The comparison device according to claim 1, wherein the comparison means executes the comparison operation when the detection results of the reference song pitch detection means and the comparison song pitch detection means are obtained at the same time. 3. The comparison device according to claim 1, wherein the comparison means determines the comparison result at regular time intervals. 4. The comparing means fixes the comparison result at fixed time intervals, and when a plurality of detection results of the reference singing pitch detecting means and the comparative singing pitch detecting means are obtained within the fixed time of fixing the comparison result, The comparison apparatus according to claim 1, wherein an average value of the obtained plurality of comparison results is used as a comparison result for a certain period of time. 5. The reference singing pitch detecting means for detecting the pitch of the reference singing, the comparative singing pitch detecting means for detecting the pitch of the comparative singing, and the comparative singing pitch detecting means by accompaniment pitch information indicating the pitch of the accompaniment. A comparing device comprising: a pitch information correcting means for correcting the pitch information, and a comparing means for comparing the pitch information outputted by the reference song pitch detecting means and the pitch information correcting means and outputting a comparison result. 6. The comparison device according to claim 5, wherein the comparison means executes the comparison operation when the detection results of the reference song pitch detection means and the comparison song pitch detection means are obtained at the same time. 7. The comparison device according to claim 5, wherein the comparison means determines the comparison result at regular time intervals. 8. The comparing means fixes the comparison result at fixed time intervals, and when a plurality of detection results of the reference singing pitch detecting means and the comparative singing pitch detecting means are obtained within the fixed time of fixing the comparison result, The comparison apparatus according to claim 5, wherein an average value of the obtained plurality of comparison results is used as a comparison result for a certain period of time. 9. A reference song pitch detecting means for detecting a pitch of a reference song, a comparative song pitch detecting means for detecting a pitch of a comparative song, and a pitch output by the reference song pitch detecting means and the comparative song pitch detecting means. A comparison device comprising: comparison means for comparing information and outputting comparison information; and comparison information correction means for correcting the comparison information of the comparison means with accompaniment pitch information indicating a pitch of an accompaniment. 10. The comparison device according to claim 9, wherein the comparison means executes the comparison operation when the detection results of the reference song pitch detection means and the comparison song pitch detection means are obtained at the same time. 11. The comparison device according to claim 9, wherein the comparison means determines the comparison result at regular time intervals. 12. The comparing means determines a comparison result at fixed time intervals, and when a plurality of detection results of the reference singing pitch detecting means and the comparative singing pitch detecting means are obtained within the fixed time of fixing the comparison result, 10. The average value of the obtained plurality of comparison results is used as the comparison result for a certain period of time.
The comparison device described in 1. 13. A pitch conversion means for converting the pitch of the reference song by accompaniment pitch information indicating the pitch of the accompaniment, and a reference song pitch detection means for detecting the pitch of the pitch-converted reference song output by the pitch conversion means. A comparison singing pitch detecting means for detecting the pitch of the comparative singing, and a comparing means for comparing the pitch information output by the reference singing pitch detecting means and the comparative singing pitch detecting means and outputting a comparison result. Comparison device. 14. The comparison device according to claim 13, wherein the comparison means executes the comparison operation when the detection results of the reference song pitch detection means and the comparison song pitch detection means are obtained at the same time. 15. The comparison device according to claim 13, wherein the comparison means determines the comparison result at regular time intervals. 16. The comparing means fixes a comparison result at fixed time intervals, and when a plurality of detection results of the reference song pitch detecting means and the comparative song pitch detecting means are obtained within the fixed time of fixing the comparison result, The average value of the obtained plurality of comparison results is used as the comparison result for a certain period of time.
3. The comparison device described in 3.